.App{
  width: 100%;
  min-height: 600px;
  background-color: #cdcdcd;
  padding-bottom: 20px;
}
.content{
  width: 800px;
  margin: 20px auto;
}
.content ul{ 
    list-style: none;
    padding: 0;
    margin: 0;
}
.content ul li{
  background-color: #fff;
  border-radius: 4px;
  border-left: 5px solid #639a9c;
  height: 34px;
  line-height: 34px;
  position: relative;
  margin-top: 20px;
}

.content ul li button{
  position: absolute;
  top: 5px;
  right: 10px;
}
